:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,Helvetica Neue,Arial,sans-serif;background:#0c0f16;color:#e9ecf2;--accent: #63c7ff;--accent-2: #9fb2ff;--panel: rgba(255, 255, 255, .08);--panel-border: rgba(255, 255, 255, .12);--white-key: #f4f1ea;--black-key: #1c1d25}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at top,#232b3a,#0c0f16 55%,#090b10)}#root{min-height:100vh;background-image:radial-gradient(circle at 20% 20%,rgba(255,179,71,.2),transparent 45%),radial-gradient(circle at 80% 10%,rgba(99,199,255,.18),transparent 40%)}.app{max-width:1180px;margin:0 auto;padding:48px 24px 64px;display:flex;flex-direction:column;gap:40px}.hero{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}.tag{text-transform:uppercase;letter-spacing:.24em;font-size:.72rem;color:var(--accent);margin:0 0 14px}.hero h1{font-size:clamp(2.4rem,3vw,3.4rem);line-height:1.1;margin:0 0 12px}.hero h2{margin:0 0 8px;font-size:1.4rem;font-weight:600;color:#c7cbd6}.room-title{margin:0 0 8px;font-size:1.05rem;font-weight:600;color:#e9ecf2}.subhead{margin:0;font-size:1rem;color:#c7cbd6}.keys{color:var(--accent-2);font-weight:600}.panel{background:var(--panel);border:1px solid var(--panel-border);padding:20px 24px;border-radius:18px;min-width:220px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;flex-direction:column;gap:12px}.panel h3{margin:0;font-size:1.35rem}.lobby{display:flex;flex-direction:column;gap:24px}.lobby-row{display:flex;gap:12px;flex-wrap:wrap}.lobby input{flex:1;min-width:160px;padding:10px 12px;border-radius:12px;border:1px solid rgba(255,255,255,.15);background:#0c0f1699;color:#e9ecf2;font-size:.95rem;text-transform:none}.lobby button{padding:10px 16px;border-radius:12px;border:1px solid rgba(255,255,255,.18);background:#ffffff14;color:#e9ecf2;font-weight:600;cursor:pointer}.room-list button[disabled]{background:#ffffff26;color:#9aa1b5;cursor:not-allowed}.room-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}.room-card{border:1px solid rgba(255,255,255,.12);background:linear-gradient(135deg,#ffffff0f,#0c0f1659);border-radius:16px;padding:16px;color:#e9ecf2;text-align:left;cursor:pointer;transition:transform .12s ease,border-color .12s ease,box-shadow .12s ease;box-shadow:inset 0 0 24px #ffffff0a}.room-card:hover{transform:translateY(-2px);border-color:#ffffff59;box-shadow:0 16px 30px #00000040,inset 0 0 30px #ffffff14}.room-card.full{opacity:.5;cursor:not-allowed;box-shadow:none}.room-card-title{font-size:1rem;font-weight:600;margin-bottom:6px}.room-card-meta{font-size:.85rem;color:#b9bfd0}.muted{color:#b1b7c7;margin:0}.error{color:#ffb3b3;margin:0}.session-footer{display:flex;justify-content:flex-start}.panel-row{display:flex;justify-content:space-between;font-size:.95rem;color:#d7dbe6;gap:12px}.panel-row strong{text-transform:capitalize;color:#fff}.leave-button{align-self:flex-start;padding:10px 16px;border-radius:12px;border:1px solid rgba(255,255,255,.2);background:transparent;color:#e9ecf2;font-weight:600;cursor:pointer}.leave-button:hover{border-color:#ffffff73}.stage{display:grid;grid-template-columns:1fr;gap:32px;align-items:start}.left-column{display:flex;flex-direction:column;gap:24px}.session-row{display:flex;gap:20px;align-items:stretch;align-self:flex-start}.session-row .session-footer,.session-row .presence{flex:0 0 auto}.piano{position:relative;background:linear-gradient(135deg,#ffffff14,#ffffff05);border-radius:24px;padding:28px 24px 34px;min-height:260px;border:1px solid rgba(255,255,255,.08);box-shadow:0 20px 40px #0000004d;overflow:hidden}.white-keys{display:flex;gap:8px}.key{border:none;cursor:pointer;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:4px;font-family:inherit;transition:transform .08s ease,box-shadow .08s ease;-webkit-user-select:none;user-select:none;touch-action:none}.key span{pointer-events:none}.key.white{width:64px;height:220px;border-radius:0 0 16px 16px;margin-right:8px;background:var(--white-key);color:#1a1c24;box-shadow:inset 0 -4px 10px #00000014}.key.white.active{transform:translateY(4px);box-shadow:inset 0 -2px 8px #63c7ffd9}.key.black{position:absolute;top:28px;width:46px;height:130px;border-radius:0 0 12px 12px;background:var(--black-key);color:#f4f5f8;box-shadow:inset 0 -8px 14px #00000080;z-index:2}.key.black.active{transform:translateY(3px);box-shadow:inset 0 -4px 10px #63c7ffe6}.note{font-size:.75rem;font-weight:600}.char{font-size:.9rem;font-weight:700;margin-bottom:12px}.presence{background:var(--panel);border:1px solid var(--panel-border);border-radius:20px;padding:24px}.presence h2{margin:0 0 16px;font-size:1.2rem}.presence ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}.presence li{display:grid;grid-template-columns:14px 1fr 2fr;gap:10px;align-items:center}.dot{width:10px;height:10px;border-radius:50%;background:var(--accent-2);display:inline-block}.name{font-weight:600;color:#f2f4f8}.notes{color:#b9bfd0;font-size:.9rem}@media (max-width: 980px){.stage{grid-template-columns:1fr}.piano{overflow-x:auto}.session-row{flex-direction:column;align-items:stretch}}@media (max-width: 720px){.hero{flex-direction:column;align-items:flex-start}}